505212120636 has 24 divisors (see below), whose sum is σ = 1180210284624. Its totient is φ = 168206611200.

The previous prime is 505212120599. The next prime is 505212120659. The reversal of 505212120636 is 636021212505.

It is a junction number, because it is equal to n+sod(n) for n = 505212120597 and 505212120606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24667965 + ... + 24688436.

It is an arithmetic number, because the mean of its divisors is an integer number (49175428526).

Almost surely, 2^505212120636 is an apocalyptic number.

It is an amenable number.

505212120636 is an abundant number, since it is smaller than the sum of its proper divisors (674998163988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505212120636 is a wasteful number, since it uses less digits than its factorization.

505212120636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49357261 (or 49357259 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 505212120636 in words is "five hundred five billion, two hundred twelve million, one hundred twenty thousand, six hundred thirty-six".